diff --git a/test/data_mock.hpp b/test/data_mock.hpp
index 44cc376..44c3aae 100644
--- a/test/data_mock.hpp
+++ b/test/data_mock.hpp
@@ -13,6 +13,7 @@
     virtual ~DataHandlerMock() = default;
 
     MOCK_METHOD0(open, bool());
+    MOCK_METHOD0(close, bool());
     MOCK_METHOD1(copyFrom, std::vector<std::uint8_t>(std::uint32_t));
     MOCK_METHOD1(write, bool(const std::vector<std::uint8_t>&));
     MOCK_METHOD0(read, std::vector<std::uint8_t>());